| 摘要 |
The present invention decreases the load on a conductive foil of an FPC (flexible printed circuit board). This power source device is provided with: a plurality of battery cells (1) having electrode terminals (13); a rigid substrate (9) at which a detection circuit that detects the state of the battery cells (1) is mounted; an FPC (7) that electrically connects the electrode terminals (13) and the detection circuit; and a connection member that is provided to the tip of the FPC (7) and electrically connects the battery cells (1) and the FPC (7). The FPC (7) has an affixing section (8) that is affixed to the rigid substrate (9). The affixing section (8) contains: a signal line connection section (81) that has one end affixed to the rigid substrate (9) and has a conductive foil (71) that electrically connects the electrode terminals (13) to the detection circuit; and a reinforcing section (82) that has one end affixed to the rigid substrate (9) and that has an affixing metal foil (74) insulated from the electrode terminals (13). The signal line connection section (81) has a connection region overlapping the rigid substrate (9). The power source device is further provided with a reinforcing pad (83) that extends in the vertical direction with respect to the direction of extension of the conductive foil (71) in the connection region. |
